Electrical connecting device



Mar. 3. l 925.

K. KNUDSEN ELECTRICAL CQNNEICTING DEVICE Filed March 14. 1922 mvemon '(W lg W fizm vices, of which the following is a specifi illustrated one of various possible embodiand i 10 of insu 1,528,491 ICE.

Patented Mar. 3, 1925.

UNITED STATES PATENT OFF KNUD KNUDSEN, or DANBURY, comrhcrrcrrr. ELECTRICAL commc'rmo DEVICE. Application filcd March 14, 1922. Serial No. 543,719.

in the ends of a sheet metal supporting To all whom it may concern.-

' member 18.

Be it known that I, KNUD KNUDSEN, a. subject of the King of Denmark, and a resident of Danbury, in the county of Fairlieid h and State of Connecticut, have invented an 7 niprovemcnt in Electrical Connecting Decation.

This invention relates to electrical concting devices, and with regard to the more 1 At the upper en provided with a round central One of the objects thereof ed in the central opening of an his construction inter Another object is to provide supporting member 18 a device of the above nature which can be quickly and conveniently taken apart and reassembled and yet the parts of which are sp0t-welding at the surfaces 23. securely he (1 in assembled relation. Another object is to provide a push button .of inexpensive construction and yet Well adapted to meet the conditions of hard practical the edges of use. ther objects will be in part obvious in part pointed out hereinafter.

e invention accordingly consists in the features of construction, combinations of elements and arrangement of parts, all of which will be exemplified in the construction hereinafter described, and the scope of the application of which will be indicated in the ollowing claims.

In the accompanying drawingin which is ficient action.

ments of this invention, to the plate 10,

Figure l is a sectional View line 11 of Figure 2;

Figure 2 is a bottom plan view of the de-- f vice shown in Figure 1. indicated in dotted lines at 32,and t a push Similar reference characters refer to simibutton 33 correspohdlhgllf eIeYated- This lar parts throughout both views of the Ph button howevelja h 18 Provided drawing wlth the flange 34 to h m1t its upward move- Referring now in detail to Figure 1 of meht, 13 here Sh P P the drawing, there is shown aplate or bar to force the p lating material, having threaded contact with the hpp h h the bottom, Screws 11 and 12, of the S01 ews 11 and 12. this position,

may be noted that due to the 0011- struction of the spring, there is a slight rubing movement as the b which tends to faces clean and resistance engagement.

Considering how the action of the device :-\Vith the plate 10 having its ends resting in the recesses in support 18 and taken of the thereinte from and ti against stop shoulders 19, the conductors l4 and 15 are drawn from the wall to such extent as to permit their bare ends to be sccured beneath the heads of the screws 11 and 12. This connection of the wires may be made without taking the device apart. The entire device may thcnbe secured to the wall by the screws 27, which are spaced from and entirely independent of the contents of the casing, thus permitting them to ll at a firm portion distant from the opening through which the wires are drawn; a so this spacing of the screws obviates the chance of their contact with the wires, with the likelihood oi shortcircuiting or grounding thelatter. If it be disassemble the device for purposes of inspection or repair, the screws 27 d without altering the unitary the construction. e wires then may drawn a safe distance through the wall, and thereupon the plate 10 which contains the entire electrical equipment, may be quickly removed by twisting it with respect to the support 18. Due to the extremely small number of parts and the direct electrical circuit, there is small likelihood of the device becoming inoperative, and in case of breakage, any o t e parts may be quickly replaced at low cost.

It will thus be seen that there is provi a construction in which the several objects of this invention are achieved.

As various changes might be made in the above construction without departing from e of this invention, it is to be under stood t at all matter herein described, or shown in the accompanying drawings, is to be interpreted as illustrative and not in a limiting sense.

I claim as my invention:

1. In constructionfor push buttons and the/like, in combination, a member of insulating materia a fiat sprin passing through said member and shape to interlock there-with, u n said mem which said spring co-acts to form an electrical connection.

2. In construction for push buttons and the like, in combination, a member forme of insulating material, a pair of screws passing through said member, a pair of conductors having their ends respectively secured to the outer ends of said'screws, an a spring member interlocked with said first member and shaped to co-act with the inner ends of said screws and form an electrical connection therebetween.

3. In construction for push buttons and the like, in combination, a casing member, an inner member rigidly secured to said casing and extending across the same and having its ends shaped to iorm a pair of inwardly facing recesses, and an inner'device to which the conductors are secured, proand contact means mounted er with d stantially.

. ing through vided with ends adapted to be rotated into interlocked relation with said recesses.

4. In construction for push buttons and g the like, in combination, an insulating member, a pair of members passing therethrough and adapted to have removably connected to their outer ends a pair of conductors, a spring mounted upon said insulating memher and adapted upon being depressed, to complete an electric circuit between sai members,'said spring being mounted to move into and out of engagement with the inner end of one of said members, an outer casing provided with means carried interiorly thereof, said means having a pair of spaced recesses with which said insulating member may be interlocked upon movement of said insulating mem r in its owniplane an relative to said means, and means adapted to secure the said outer casing to the wall.

5L In construction for push buttons and the like, in combination, a member formed of insulating material, a pair of terminal members thereon, and a spring member interlocked with said insulati member and adapted to bridge across sai two terminal members.

6. In construction for push buttons and the like, in combination, a member formed of insulatin material an providing a subat upper surface; a terminal thereon and projectin upwardly from said substantially fiat sur ace of said member; flat spring bent substantially upon itself to provide an elongated operative portion extending over the substantially fiat upper suriace of said member for coaction an end portion seate with said terminal, upon the flat upper surface of said member, looped rtion extendand an intervening ing below the plane of said flat upper surface of said member.

7. In construction for push buttons and the like, in combination, a supporting block formed of insulating material: a flat spring mounted upon sai block, said spring having an end portion resting against an upper part of said block and adjacenhone end thereof, a substantially loop-shaped portion extending from said end portion downwardly below the plane of the upper part of said block and thence upwardly, said spring being thereupon extended into an operative portion overlapping but spaced from the upper part of said lock; and contact means upon said member with which said operative portion of said flat spring may coact to form an electrical connection. 8. In construction for pus buttons and the like, in combination, a supporting block formed of insulating material and having a portion cut away at one end; a screw passsaid block and adapted to permit connection thereto of a conductor; a fiat spring bent substantially upon itself to lilll provide an end portion resting against an a of insulating material; a flat spring associated therewith and passing twice through said member, and having a portion overlapping said member; and contact means mounted upon said member and adapted to coact with said overlapping portion of said spring to form an electrical connection.

10. In construction for push buttons and the like, in combination, an insulating supporting block having a pair of spaced screws passing therethrough and having an aperture adjacent one of said screws; anda spring member having an end portion resting against an upper part of said block, said member being shaped to pass downwardly through said aperture, thence up wardly to form an operative end portion overlapping said block for coaction with one of said screws, said block being cut away to permit the upwardly extending portion of said spring to pass into overlapping relation relative to said block and one of said screws.

11.. In construction for push buttons and thelike, in combination, a casing adapted to rest against the surface of a wall; an insulatin' block having mounted thereon a projecting contact member; means mounting said insulating block within said casing but spaced from the plane of the surface of said wall and with said contact member extending inwardly with respect to said casing; and a spring member associated with said insulating block for coaction with said contact member. said spring member being shaped to provide a free operative end portion overlapping the inner face of said block and also said contact member, and a looped portion extending into the space between the outer face of said block and the plane of the surface of said wall.

12. In construction for push buttons and the like, in combination, a casing; an in.- sulating block having mounted theieon a projcctin contact member; means mounting said insulating block within said casing and with said contact member extending inwardly with respect to said casing; and a spring for coaction with said contact member having an end portion relativel fixed with respect to said insulating bloc said spring being shaped to provide a free operative end overlapping the inner face of said block for coaction with said contact mem her and a substantially loop-shaped portion extending outwardly with respect to said casing and beyond the plane of the inner face of said insulating block.

13. I construction for push buttons and the like, in combination, a casing, an inner member secured to said casing and extending transversely thereof, an insulating block carrying a terminal member and a spring member for coaction therewith, said spring member being interlocked with said insulating block, and means for removably interlocking said insulating block with said inner member.

14. In construction for push buttons and the like, in combination, a sheet-metal supporting member having downwardly extending and laterally spaced portions of arcuate shape, an inner device car ing connecting mechanism and provided with end portions of arcuate shape adapted to be fitted betwusn said spaced portions of said sup orting member, means independent of said inncr device for mounting said supporting member on a wall, and a shoulder in each of said spaced arcuate portions of said sheetmetal member pressed inwardly toward said arcuate end portions of said second member for limitin relative rotational movement between sai two members.

15. In construction for push buttons and the like, in combination, a casing; a platelike substantially rectangularly shaped insulating member having a; air of screws threaded therethrough and fi'om the outer face thereof, said screws being adapted to have removably connected to their outer ends a pair of conductors; means associated with said casing and providing a. supporting led e adjacent the lower end of said casing, sai led e having an interruption therein to permit-t e insertion therethrough and into said casing of said plate-like member and to permit, u on a subsequent rotary movement of said p ate-like member to swing an end portion of the latter onto said supporting ledge; and contact-making mechanism interposed between the upper end of said casing and said plate member for coaction with the inner end of one of said screws.

16. In construction for push buttons and the like, in combination, a casing; a platelike insulating member of substantially rectangular shape having a pair of screws threaded therethrough and from the outer face thereof, said screws being adapted to have removably connected to their outer ends a pair of conductors; and a sheet-metal supporting member extending transversely of said casing and secured thereto, said supporting member being arranged to support said insulating member substantially intermediate the upper and lower ends of said casing and having a pair of spaced depending portions between and by which two opposite ends of said rectangularly shaped insulating member are en and held.

17. In construction for push buttons and threaded therethrough and from the outer face thereof, saidscrews being adapted to have removably connected to their outer ends a. pair of conductors; a sheet-metal supporting member extending transversely of said casing and secured thereto, said supporting member being arranged to support said insulating member substantially intermediate the upper and lower ends of said casing and having a pair of spaced depending portions between and by which two opposite ends of said rectangularly shaped insulating member are engaged and held; and a spring bentto form. an operative portion overlappin one of said'screws and an intermediate 'ntiall loop-shaped portion passing twice throng the plane of one face of said insulating member.

In testimony whereof, I have signed my name to this specification this 21st day of February, 1922'.

- KNUD KNUDSEN.

mediate the upper and lower ends of said casing and having a pair of spaced depending portions between and by which two opposite ends of said rectengularly shaped insulating member are engaged and held; and a spring bent to form an operative portion overlapping one of said screws and an intermediate substantially loop-shaped portion passing twice through the plane of one face of said insulating member.

In testimony whereof, I have signed my name to this specification this 21st (lav of February, 1922'. n

- KNUD KNUDSICN.

Qertificate (it i'forreetion.

it is herebv certified that in Letters Patent No. 1,528,-i91, granted March 3, 1925. Upon tlie application of Knud Knndsen, 3f Denbury, C'onnecticpt, forteg Fnprovement in Elertrieal Connecting Devices, an error eppeeis n t e prinf e1 'ytJCifiCfitlUH requiring rorrection as follows: 31kg? L afteriline 24. nselt he 0 j i i'n miszmvfimi for pus]: buttons and flie take. m aombmntwm a coezbng Jamar to reel? (lg ohm ZJIP, surf/we of m walka n l h mrwg (I push Mu ton, more; if 1 phoned at its upper will, an iJiS'LlJ/I-fiflfl Nook Ram-rig i noun ted thew eon 0: 0071mm} -wii'iom; means mounting mid insulating blade 102M271 sued: ('(LS'Z'R/g out spac'ed w he plane of file mv'fave of said well end a sprang? for macho? with S620 HHNLLT gembemgm'ii xii-P5131] Ming; 'w'wze rineiiwd at one end thereof 'IIWfJ said ensumy dock and izmriiig im fl/ 'Ptll wmklwle portionrrtewdjng from. the under- Ju'vr wed insulating Noe/1* into M 1 nan/upon sa'i tuts'matzm Moria and the up} gmrtion of said casing for coanzimi with mail pul e/i Quito t. 4

in construntion-for push, buttons and the same, in comomatzov a cum 1g, rm inner memer of sheet metal reoured in goat ("Ml n!) and emtenoimg arrow the eeing an insulating Moria carrying a fe vnmal member and a sprang member for "(motion iierewi'tfzW mid .i-pv'z'ng member 012mg interlocked at one film 80f wet/L mid inside-ting bionic. and said sheet metal mner member and mai block 726mg moped f0 periniii the letter m be married wit/tin zfi/ie former upon relative movement "Airw I if; iiiiit tife siiid Letters Patent should be read with correetlon therein that the w n new ro-niorni to the record of the i "26 retent Otlice.

r igned and sealed this 24th day of .7: w it, l i. p

entil; FENNENG,

A I m; Cowwmssiomr of Patents.

Certificate of Correction.

It is hereby, certified that in Letters Patent No. 1,528,491, granted March 3, 1925, upon the apglioetion of Knud Knudsen, of Dmbury, Cbnnecticut, for an improvement in lectrical Connectin Dew ioea, an error appears in the printed specification wrrection as f0 lows: Page 4, after.hnc:24, insert the 0]- mwin as clhims 18 and 19.

18. n construction for push buttons and the like, in mmbination, a mehiq adapted to rest agaimt the surface 'a/ a wall'and having a pack button movi'ibl y supported at its upper and; an imulatt'ng block knving mounted thereon a com member; meanemounting said inndating blot-k within mid. but lptwed [mm the of the surface of mid man; and a eprina for opaction with mid uslims,- mad spring hi -Mame at oneeml thereof with lafing block am? having an 0 7mm g ieldable portion mm from m 'uifilerside of said block into the space between said e'mulating block and the upper portion of said casing for coactn'on with said push button. v

1.9. In constellation-for push buttons and the like, in combination, a casing, an inner member of sheet metal secured to said casing and attending across the casing, an bled: cah-ying a terminal member and a mi member for coactflm therewith, mitl spring member being interlocked at one my thereof with said insulating block, and said sheet metal inner member and mid block being shaped to permit the latter to be seated with/ 1i tfie former upon relative movement therebetween; and that the said Letters Patent should be read with this cob-action therein that the same may conform to the record of the case in the Paiigent Ofliea.

Signed and sea-led this 24th (lay of March. D 1925. I

{HEAL} KARL FENNING,

' Acting- Oomnulefimwr of Patents. 

